how to add data points to a scatter plot with trend line
I want to add data points to the scatter plot that are not part of the data
ie. add points to find their concentration on a standard curve. |
Answer: how to add data points to a scatter plot with trend line
Steps to add data points to a scatter plot with a trend line in Microsoft Excel:
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You can add another series to the graph. While editing the graph,
Select Chart - Source Data - Series Select ADD under the series window and enter the name and the X and Y values for the series. There are other ways to do this, as well. "Samantha" wrote in message ... I want to add data points to the scatter plot that are not part of the data ie. add points to find their concentration on a standard curve. |
The intent of your question is not entirely clear, as evidenced by
different interpretations by different responders. If you click on the the plotted data series, the formula bar will display the range of data plotted. If you extend that range in the formula bar, you can add support x-values to visually extrapolate the trendline beyond the data. Note however that when the mouse cursor floats over the graph, y-values will be displayed only for actual x-y data points in the graph, not for interpolated/extrapolated points on the trendline. If you right click on the trendline, and select Format Trendline, you can go to the Options tab and request that the equation be displayed. If you format that equation to display in scientific notation with 14 decimal places (to ensure that coefficient values are not obscured through rounding) then you can calculate y-values for any x-values that you desire. Alternately, most trendlies can be recalculated using LINEST or LOGEST. Jerry Samantha wrote: I want to add data points to the scatter plot that are not part of the data ie. add points to find their concentration on a standard curve. |
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